![hannahbear16841](/avatars/27124.jpg)
hannahbear16841
30.11.2021 •
Mathematics
4x{[8+5)x 4]-[(18-9)x 3]}
show work pls
Solved
Show answers
More tips
- F Food and Cooking Homemade kvass: recipe and brewing process...
- O Other What is a Disk Emulsifier and How Does it Work?...
- H Health and Medicine How to Calm Your Nerves? Expert Tips That Actually Work...
- A Animals and plants 5 Tips for Taking Care of Yews to Keep Them Green and Beautiful...
- S Sport How to wrap boxing hand wraps? Everything you need to know!...
- F Food and Cooking 10 Reasons Why You Should Avoid Giving Re-Gifts: An Informative Guide...
- F Family and Home Tender Care for Your Parquet: Is it Possible to Clean Parquet?...
- S Style and Beauty How Are Eyelash Extensions Applied? All Your Questions Answered...
- F Food and Cooking 10 Tips for Proper Sushi Consumption...
- S Style and Beauty Learn how to tie a keffiyeh on your head like a pro...
Answers on questions: Mathematics
- M Mathematics John went to the bakery and bought several dozen donuts and several dozen bagels. The donuts cost $9 per dozen and the bagels were $8 per dozen. If he spent a total of $101...
- M Mathematics Line segments hg and hj in xy-coordinate plane both have common endpoint h (-2, 4) and midpoints m1 at (-2, 10) and m2 (8, 5), respectively. what is the distance between m1...
- M Mathematics The tree diagram represents the sample space for meat and cheese sandwiches at Rooney s Deli. Which of the following shows the ratio of sandwiches with American cheese to the...
- M Mathematics ANAWER ASAP NEED HELP ASAP...
- S Social Studies Select the correct answer. which statement is true? a. political philosophy does not change. b. the philosophy of politics is not important. c. politics and philosophy do not...
- S SAT The normal model n(58,21) describes the distribution of weights of chicken eggs in grams. Suppose that the weight of a randomly selected chicken egg has a z-score of -1. 41....
Ответ:
Range
The range measures the spread of the dataset by calculating the difference between the largest and the smallest element. In your case, marks range from 6 to 10, so the range is 10-6=4.
How many students
The frequency tells you how many students got each mark. So, we know that 5 students got a mark of 6, 4 students got a mark of 7, 7 students got a mark of 8, 10 students got a mark of 9, 4 students got a mark of 10.
This implies that, in total, we have
Mean
The mean is given by the sum of the marks, divided by the number of students. We already observed how many students got each mark, so the sum of all marks will be a weighted sum, where each mark counts once per student:
Now we divide this sum by the number of students to get
So, the average mark is about 8.